Zero-field spin resonance in graphene with proximity-induced spin-orbit coupling

Abstract

We investigate collective spin excitations in graphene with proximity-induced spin-orbit coupling (SOC) of the Rashba and valley-Zeeman types, as it is the case, e.g., for graphene on transition- metal-dichalcogenide substrates. It is shown that, even in the absence of an external magnetic field, such a system supports collective modes, which correspond to coupled oscillations of the uniform and valley-staggered magnetizations. These modes can be detected via both zero-field electron spin resonance (ESR) and zero-field electric-dipole spin resonance (EDSR), with EDSR response coming solely from Rashba SOC. We analyze the effect of electron-electron interaction within the Fermi- liquid kinetic equation and show that the interaction splits both the ESR and EDSR peaks into two. The magnitude of splitting and the relative weights of the resonances can be used to extract the spin-orbit coupling constants and many-body interaction parameters that may not be accessible by other methods.

20 pages, 6 figures

References in corpus (16)

• Intrinsic and Rashba Spin-orbit Interactions in Graphene Sheets
• Spin-orbit gap of graphene: First-principles calculations
• Van der Waals heterostructures for spintronics and opto-spintronics
• Spin-Orbit Proximity Effect in Graphene
• Spin-orbit driven band inversion in bilayer graphene by van der Waals proximity effect
• Large Proximity-Induced Spin Lifetime Anisotropy in Transition Metal Dichalcogenide/Graphene Heterostructures
• Drude weight, plasmon dispersion, and a.c. conductivity in doped graphene sheets
• Tunable spin-orbit coupling and symmetry-protected edge states in graphene/WS${}_2$
• Strong electron-hole symmetric Rashba spin-orbit coupling in graphene/monolayer transition metal dichalcogenide heterostructures
• Chiral spin resonance and spin-Hall conductivity in the presence of the electron-electron interactions
• Electronic properties of graphene and graphene nanoribbons with "pseudo-Rashba" spin-orbit coupling
• Collective modes in two- and three-dimensional electron systems with Rashba spin-orbit coupling
• Chiral Spin Mode on the Surface of a Topological Insulator
• Spin transport in high-mobility graphene on WS${}_2$ substrate with electric-field tunable proximity spin-orbit interaction
• Theory of Electric Dipole Spin Resonance in a Parabolic Quantum Well
• Fermi-edge exciton-polaritons in doped semiconductor microcavities with finite hole mass